Stern davit and bumper for boats



Oct. 25, 1949. F. l. ANDRADE I 2,486,094

' STERN DAVIT AND BUMPER FOR BOATS I Filed 001;. v1.2 1945 INVENTOR.74m? Z flndra 42% Patented Get. 25, 1949 UNITED STATES PATENT OFFICESTERN DAVIT AND BUMPER FOR BOATS Frank I. Andrade, Fall River, Mass.,assignor to Frank Mulveny, Fall River, Mass.

Application October 12, 1945, Serial No. 621,880

1 Claim. 1

This invention relates to davits or launching devices for launchingsmall boats such as tenders or life boats from comparatively smallships, and in particular a substantially rectangular shaped frame hingedto the lower edge of a fiat stern board of a boat wherein, when not inuse the frame is positioned against the end of the stern to provide abumper, and in which the frame is provided with folding arms that arehinged to nest in arcuate vertically disposed end members of the frameor to be extended outwardly for supportin a boat.

The purpose of this invention is to provide a device for launching smallboats from the stern of larger ships in which the device provides abumper for the end of the ship when not in use.

Various types of davits have been provided for launching life boats andtenders from the sides of both small and large ships but these devicesare permanently installed and are therefore objectionable for use oncomparatively small boats.

With this thought in mind this invention contemplates a small boat ortender launching device that may be nested against the stern of the shipwhen not in use and which also provides a bumper for the ship.

The object of this invention is, therefore, to provide means forconstructing a davit or boat launching device whereby the device may befolded to an out of the way position when not in use and which mayreadily be opened and extended for use.

A further object of the invention is to provide a davit that may bepositioned against the stern of a ship that provides a bumper when notin use and that is of a simple and economical construction.

With these and other objects in view the invention embodies asubstantially rectangular shaped frame having vertically disposedarcuate end members semi-circular in cross section, with arms hinged inthe upper ends thereof, with the lower ends of the end members connectedby a bar and with the upper ends connected by an arcuate strut thatnests over the upper edge of the stern board of a boat, and in which thelower ends of the end members are hinged to the stern board.

Other features and advantages of the invention will appear from thefollowing description taken in connection with the drawings wherein:

Figure 1 is a side elevational view showing the davit in the extendedposition in full lines and in the folded, and also in an intermediateposition in dotted lines.

Figure 2 is a detail illustrating the connection between the ends of theupper strut and the arcuate end members, with parts broken away.

Figure 3 is an elevational view looking toward the stern of the boatillustrating the device in the nested position against the stern of theboat.

Figure 4 is a detail showing a section through the upper end of one ofthe end members illustrating the method of hinging one of the boatholding arms in the frame and taken on line 4--4 of Figure 3.

Figure 5 is a detail showing a section through one of the end members ofthe frame taken on line 5-5 of Figure 3.

Figure 6 is also a detail taken on line 6-6 of Figure 3 showing a crosssection through the upper strut and showing the upper part of thearcuate end member at the end of the strut.

Referring now to the drawings wherein like reference characters denotecorresponding parts the improved davit of this invention includes anupper strut II], the ends of which are connected by welding to arcuatevertically disposed end members II and I2, with -arms I 3 and I4 hingedin the upper ends of the end members and with the lower ends of the endmembers connected by a bar I5. The lower ends of the end members H andI2 are provided with hubs l6 and I! through which the lower ends of theend members are pivotally mounted on the stern of a boat l8 by pins ISin bearings 20.

The end members II and I2 are substantially semi-circular in crosssection and the outer surfaces of the upper ends thereof are cut awayproviding recesses 2| and 22 through which the arms l3 and I4 extendwhen the davit is in use.

The arms l3 and I4 are provided with hubs 23 and 24 through which theyare pivotally mounted by pins '25 and 26 in the sides of the end membersII and 12 as illustrated in Figures 2, 4, and 6. The sides of each ofthe end members are provided with openings for the pins 25 and 26 asindicated by the numerals 27 and 28 in Figure 2 and the inner sides ofthe said end members are integrally connected to the ends of the strutII] as shown in Figure 2.

With the arms pivotally mounted in this manner they are adapted to foldto nested positions within the end members and when the davit is usedthe arms are extended outwardly as indicated by the dot and dash linesin Figure 4 with the arms resting upon the end surfaces 29 of the outerwalls of the end members in the recesses 2| and 22, thereby providingmeans for supporting the arms in the outwardly extended position.

A rope or cable 30 extends outwardly from the stern of the ship and theouter end is connected to the strut ID at the point 3| thereby providingmeans for supporting the davit and also for holding the davit againstthe stern of the boat. The inner end of the rope may be connected to awinch as indicated in dotted lines in Figure 1.

It will be understood that modifications may be made in the design andarrangement of the parts without departing from the spirit of theinvention.

What is claimed is:

In a davit for a boat having a sternboard with a centrally disposedopening through the upper edge, the combination which comprises asubstantially rectangular-shaped frame having end members shaped toconform to the lines of the sides of the boat and having an upper strutshaped to correspond to the upper edge of the said sternboard, saidupper strut having a flange positioned to extend over the upper edge ofthe said sternboard for nesting relation therewith when the davit is notin use whereby when not in use, the frame provides a bumper for theboat, the outer surfaces of the upper ends of the end members of theframe having recesses therein, means pivotally attaching the lower endsof the end members of the frame to the said sternboard,

extension arms nested in the said end members of the frame and havinghooks on the ends thereof, means pivotally mounting the ends of the saidarms opposite to the ends carrying the hooks in the end members of theframe whereby the arms swing outwardly through the recesses in the upperends of the end members of the frame and are retained in the outwardlyextended position for use by the lower ends of the said recesses in theend members of the frame, and a cable attached to the said upper strutof the frame and extended through the opening through the upper edge ofthe said sternboard of the boat for retaining the frame in the nestedposition against the sternboard of the boat for use as a bumper and alsofor holding the frame suspended in the outwardly extended position foruse as a davit.

FRANK I. ANDRADE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 666,909 Renwick Jan. 29, 19011,364,727 Dawson Jan. 4, 1921 2,294,864 Palmer Sept. 1, 1942

